Welcome to the forum. I am a big fan of Smallmouth fishing myself. I have a number of flies that do really well for them. The one I use the most is the Clouser version of a leech. Then Clousers. These are the most productive flies I have found.
That and a Steelhead pattern called a Funny Bunny Emerald Shiner. This thing is a Smallie magnet.
I do a Crayfish pattern that is a real good Smallie fly also. It is a bit more realistic and hard to tie than is probably needed, but then again, it couldn't hurt either.
Small poppers are good once the water is warm and till later in the Fall when it cools off again. I make a pretty good small popper with foam earplugs. They are a tube fly. I like them a lot.
I tie a lot of Deer hair bugs to. This is a Dahlberg. I like them a lot, and again, I probably put more effort than is really needed for this fly, but then again, couldn't hurt. Plus it's fun to tie these.
Those leaders you were talking about are furled leaders and are awsome. I use them all the time now and get them from a forum member that goes bt the handle Joni because her name is Joni.
This is a leader she made me with a tippet and Walleye fly attached. They will lay out much better than a mono leader and way easier to use than tying your own. Can't say enough good things about them. The one in this photo is a 12'er for my 15' 2 hand rod. As you can see, they get thinner as you get to the end with the fly.
You can use a mono leader, but they are a lot cheaper if you tie your own instead of buying tapered leaders. Any questions you have, feel free to ask.